Consolidated Statements of Cash Flow (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 34,072	$ 34,812
Adjustments to reconcile to net cash provided by operating activities:
Provision for loan losses	6,907	2,605
Depreciation and amortization	6,258	5,802
Net amortization of securities premiums and discounts	184	445
Realized securities gains	(35)	(7,121)
Gain on sales of loans	(1,257)	(989)
Cash receipts from the sale of loans originated for sale	86,121	84,029
Cash disbursements for loans originated for sale	(81,566)	(87,635)
Deferred income tax benefit	(1,917)	(1,464)
Gain on other assets	(1,316)	(65)
Increase in interest receivable	(1,040)	(740)
Increase/(decrease) in interest payable	14	(14)
Amortization of stock-based compensation arrangements	901	754
Other, net	(4,867)	343
Net cash provided by operating activities	42,459	30,762
INVESTING ACTIVITIES
Purchases of held for investment securities	(215)
Purchases of available for sale securities	(8,553)	(30,923)
Proceeds from maturities, calls and paydowns of held for investment securities	690	670
Proceeds from maturities, calls and paydowns of available for sale securities	102,677	12,979
Proceeds from sales of available for sale securities	300	8,576
Net change in loans	(98,555)	(10,312)
Purchases of premises, equipment and computer software	(5,048)	(4,797)
Proceeds from the sale of other assets	7,020	3,647
Net cash provided by (used in) investing activities	(1,684)	(20,160)
FINANCING ACTIVITIES
Net change in deposits	(29,376)	(96,483)
Net increase/(decrease) in short-term borrowings	3,000	(1,907)
Issuance of common stock, net	1,973	1,665
Common stock acquired	(5,523)
Cash dividends paid	(11,204)	(10,544)
Net cash used in financing activities	(41,130)	(107,269)
Net decrease in cash, due from banks and interest-bearing deposits	(355)	(96,667)
Cash, due from banks and interest-bearing deposits at the beginning of the period	1,598,177	1,913,895
Cash, due from banks and interest-bearing deposits at the end of the period	1,597,822	1,817,228
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	7,207	6,078
Cash paid during the period for income taxes	17,900	17,230
Noncash investing and financing activities:
Unpaid common stock dividends declared	$ 5,590	$ 5,281